Pseuduvaria glabrescens

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Pseuduvaria glabrescens
Pseuduvaria mulgraveana var. glabrescens.jpg
Flowers
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Magnoliids
Order: Magnoliales
Family: Annonaceae
Genus: Pseuduvaria
Species:
P. glabrescens
Binomial name
Pseuduvaria glabrescens
Synonyms [2]

Pseuduvaria mulgraveana var. glabrescensJessup

Pseuduvaria glabrescens is a small tree in the custard apple family Annonaceae endemic to a very small part of coastal Queensland, Australia. It was first described as a variety of Pseuduvaria mulgraveana , and later raised to species status.

Contents

Description

Pseuduvaria glabrescens is a tree reaching 9 m (30 ft) in height and a trunk diameter of up to 10 cm (3.9 in). Branches are dark brown to black and sparsely hairy, becoming hairless. The young branches are also densely covered in lenticels. Leaves may be elliptic, ovate or obovate, papery, and are up to 16 cm (6.3 in) long by 6.5 cm (2.6 in) wide. They have rounded bases and tapering tips, with the tapering portion up to 16 mm (0.63 in) long. They are glabrous (smooth, hairless) on both surfaces. There are 8–12 pairs of lateral veins emanating from the midrib. The petioles are very finely hairy, up to 6 mm (0.24 in) long by 2.5 mm (0.10 in) wide, and have a broad groove on their upper side. [3] : 88–89 

The inflorescences are produced either in the leaf axils or on younger branches in a process known as ramiflory. [4] [5] : 310  They are solitary on unobtrusive peduncles, each with a solitary flower. The pedicels are puberulous (minutely hairy) and measure up to 50 mm (1.97 in) long with a puberulous medial bract up to 1.2 mm (0.05 in) long. There are three sepals measuring up to 2 mm (0.08 in) long and wide, ovate in shape, and subglabrous on the outer surface. There are two whorls of three petals — the outer petals are cream-coloured and measure up to 6 mm (0.24 in) by 7 mm (0.28 in), the inner petals are cream with pink-red or purple highlights and measure up to 8 mm (0.31 in) long by 7 mm (0.28 in) wide. The inner petals have a pair of prominent, smooth, elliptical glands on their inner surface. Male flowers have up to 70-80 stamens that are up to 1 mm (0.04 in) long and wide. Female flowers have up to 29 carpels that are about 2 mm (0.08 in) long by 1 mm (0.04 in) wide. Each carpel has 1–2 ovules. Female flowers also have 6–17 sterile stamens. [3] : 88–89 

The fruit occur in clusters of 3–18 on glabrous pedicles that are 55 mm (2.17 in) long 2 mm (0.08 in) wide. The orange, mature fruit are elliptical to globe-shaped and up to 16 mm (0.63 in) by 12 mm (0.47 in) with a tapering tip about 0.8 mm (0.03 in) long. The fruit are more or less smooth and puberulous, and contain two globose seeds that are about 9 mm (0.35 in) by 7 mm (0.28 in). [3] : 88–89 

Etymology

The genus name Pseuduvaria was created from the word pseudo- meaning 'false', and the name Uvaria, a related genus. The species epithet glabrescens is Latin for 'becoming hairless'. [4]

Phytochemistry

Oils extracted from its leaves contain high levels of elemicin and methyl eugenol. [6]

Reproductive biology

The pollen of P. glabrescens is shed as permanent tetrads. [7]

Taxonomy

The species Pseuduvaria mulgraveana was first described in 1987 by the Australian botanist Laurence W. Jessup. [5] : 310  In his paper Jessup also described the varieties P. m var. mulgraveana and P. m var. glabrescens, and his reasoning was given in this very brief summation — "Distinguished from P. mulgraveana var. mulgraveana by the indumentum of the branchlets and petioles being very short and sparse and the glabrescent leaves." [5] : 312  However, the botanists Yvonne Chuan Fang Su and Richard M.K. Saunders, in a monograph published by in 2010, found that the two varieties were "substantially different in vegetative and floral morphology", and they detailed differences in the hairiness of the branches, petioles and midribs, and in the size, shape and/or number of leaves, sepals, petals and stamens. Based on these observed differences the pair raised P. m. var. glabrescens to species status with the combination Pseuduvaria glabrescens. [3] : 125–127 

While the species status of this taxon is recognised by Plants of the World Online, neither the Australian National Herbarium nor the Queensland Herbarium accept it—both continue to recognise the variety as originally named by Jessup. [1] [8]

Distribution and habitat

This species is restricted to a small part of Queensland's Wet Tropics, between the Mowbray River near Port Douglas, and the Mulgrave River south of Cairns. It grows in well developed rainforest on metamorphic, basalt and granite soils, at altitudes from near sea level to about 800 m (2,600 ft). [9] [10] [4]

Ecology

This plant serves as a host species for larvae of the green triangle butterfly ( Graphium macfarlanei ), [9] and its flowers are pollinated by flies. [11]

Related Research Articles

Pseuduvaria galeata is a species of plant in the family Annonaceae. It is a tree endemic to Peninsular Malaysia. James Sinclair, the Scottish botanist who first formally described the species, named it after the dome formed by inner petals shaped like a helmet.

Pseuduvaria taipingensis is a species of plant in the family Annonaceae. It is a tree endemic to Peninsular Malaysia. James Sinclair, the Scottish botanist who first formally described the species, named it after Taiping a city in Perak, Malaysia where the specimen he examined was collected.

Pseuduvaria clemensiae is a species of plant in the family Annonaceae. It is native to New Guinea. Yvonne Chuan Fang Su and Richard M.K. Saunders, the botanists who first formally described the species, named it after Mary Strong Clemens who collected the specimen they examined.

Pseuduvaria coriacea is a species of plant in the family Annonaceae. It is native to New Guinea. Yvonne Chuan Fang Su and Richard M.K. Saunders, the botanists who first formally described the species, named it after its leathery leaves.

<i>Pseuduvaria cymosa</i> Species of plant in the family Annonaceae

Pseuduvaria cymosa is a species of plant in the family Annonaceae. It is native to Peninsular Malaysia. James Sinclair, the Scottish botanist who first formally described the species using the synonym Pseuduvaria macrophylla var. cymosa, named it after its branched inflorescences which are called cymes.

<i>Pseuduvaria froggattii</i> Species of plant in the family Annonaceae

Pseuduvaria froggattii is a rare species of tree which is restricted to a very small part of northeastern Queensland, Australia. It is a member of the custard apple and soursop family Annonaceae, and was first described in 1887. Despite the small range its status considered to be least concern.

<i>Pseuduvaria hylandii</i> Species of plant in the family Annonaceae

Pseuduvaria hylandii is a species of plant in the family Annonaceae. It is native to Australia. L.W. Jessup, the botanists who first formally described the species, named it after Bernard Hyland an Australian botanist who collected the specimen he examined.

Pseuduvaria kingiana is a species of plant in the family Annonaceae. It is native to the Malay Peninsula. Yvonne Chuan Fang Su and Richard Saunders, the botanists who first formally described the species, named it after Sir George King, the British botanist who first collected the species.

<i>Pseuduvaria luzonensis</i> Species of plant in the family Annonaceae

Pseuduvaria luzonensis is a species of plant in the family Annonaceae. It is native to The Philippines. Elmer Drew Merrill, the American botanist who first formally described the species using the synonym Orophea luzoniensis, named it after Luzon in the province of Battan, Philippines where the specimen he examined was collected along the Lamao River.

Pseuduvaria macgregorii is a species of plant in the family Annonaceae. It is native to The Philippines. Elmer Drew Merrill, the American botanist who first formally described the species, named it after Richard MacGregor the Australian ornithologist and plant collector who collected the specimen Merrill examined.

<i>Pseuduvaria macrophylla</i> Species of plant in the family Annonaceae

Pseuduvaria macrophylla is a species of plant in the family Annonaceae. It is native to Peninsular Malaysia, Sumatra and Thailand. Daniel Oliver, the English botanists who first formally described the species using the synonym Mitrephora macrophylla, named it after its large leaves.

Pseuduvaria mindorensis is a species of plant in the family Annonaceae. It is native to the Philippines. Yvonne Su and Richard Saunders, the botanists who first formally described the species, named it after the island of Mindoro where the specimen they examined was collected in the municipality of Puerto Galera.

<i>Pseuduvaria mulgraveana</i> Species of plant in the family Annonaceae

Pseuduvaria mulgraveana is a species of plant in the family Annonaceae endemic to Queensland, Australia. L.W. Jessup, the botanist who first formally described the species, named it after the Mulgrave River, where the specimen he examined was collected.

<i>Pseuduvaria philippinensis</i> Species of plant in the family Annonaceae

Pseuduvaria philippinensis is a species of plant in the family Annonaceae. It is native to the Philippines. Elmer Drew Merrill, the botanist who first formally described the species, named it after the Philippines where the specimen he examined was collected in the Province of Quezon.

Pseuduvaria pulchella is a species of plant in the family Annonaceae. It is native to New Guinea. Ludwig Diels, the botanist who first formally described the species using the basionym Orophea pulchella, chose a specific epithet that means “beautiful little” in Latin, but he did not specify to which aspect of the plant he was referring.

<i>Pseuduvaria reticulata</i> Species of plant in the family Annonaceae

Pseuduvaria reticulata is a species of plant in the family Annonaceae. It is native to Bangladesh, Borneo, Java, the Lesser Sunda Islands, Myanmar and Sumatra. Carl Ludwig Blume, the botanist who first formally described the species under the basionym Uvaria reticulata, named it after the net-like pattern of veins on the underside of its leaves.

<i>Pseuduvaria rugosa</i> Species of plant in the family Annonaceae

Pseuduvaria rugosa is a species of plant in the family Annonaceae. It is native to Java, Laos, the Lesser Sunda Islands, Peninsular Malaysia, Myanmar, the Nicobar Islands, Sumatra and Thailand. Carl Ludwig Blume, the botanist who first formally described the species under the basionym Uvaria rugosa, named it after its wrinkled fruit.

<i>Pseuduvaria sessilifolia</i> Species of plant in the family Annonaceae

Pseuduvaria sessilifolia is a species of plant in the family Annonaceae. It is native to New Guinea. James Sinclair, the botanist who first formally described the species, named it after its stalkless leaves which lack petioles.

<i>Pseuduvaria unguiculata</i> Species of plant in the family Annonaceae

Pseuduvaria unguiculata is a species of plant in the family Annonaceae. It is endemic to The Philippines. Adolph Daniel Edward Elmer, the American botanist who first formally described the species, named it after its clawed inner petals.

<i>Pseuduvaria villosa</i> Species of plant in the family Annonaceae

Pseuduvaria villosa is a species of plant in the family Annonaceae. It is endemic to Australia. L.W. Jessup, the botanist who first formally described the species, named it after its leaves and branchlets which are shaggy with long soft hairs.

References

  1. 1 2 "Species profile—Pseuduvaria mulgraveana var. glabrescens". Queensland Department of Environment and Science. Queensland Government. 2024. Retrieved 2 September 2024.
  2. 1 2 "Pseuduvaria glabrescens (Jessup) Y.C.F.Su & R.M.K.Saunders". Plants of the World Online . Royal Botanic Gardens, Kew. 2024. Retrieved 2 September 2024.
  3. 1 2 3 4 Su, Yvonne C.F.; Saunders, Richard M.K. (2006). "Monograph of Pseuduvaria (Annonaceae)". Systematic Botany Monographs. 79. American Society of Plant Taxonomists: 1–204. JSTOR   25027955.
  4. 1 2 3 Cooper, Wendy; Cooper, William T. (June 2004). Fruits of the Australian Tropical Rainforest. Clifton Hill, Victoria, Australia: Nokomis Editions. pp. 27–28. ISBN   978-0-9581742-1-3.
  5. 1 2 3 Jessup, L.W. (1987). "The genus Pseuduvaria Miq. (Annonaceae) in Australia". Austrobaileya. 2 (4): 307–313. doi: 10.5962/p.365709 . JSTOR   41738691.
  6. ↑ Brophy, Joseph J.; Goldsack, Robert J.; Hook, James M.; Fookes, Christopher J.R.; Forster, Paul I. (2004). "The Leaf Essential Oils of the Australian Species of Pseuduvaria (Annonaceae)". Journal of Essential Oil Research. 16 (4): 362–366. doi:10.1080/10412905.2004.9698743. ISSN   1041-2905. S2CID   95394730.
  7. ↑ Su, Yvonne C. F.; Saunders, Richard M. K. (2003). "Pollen structure, tetrad cohesion and pollen-connecting threads in Pseuduvaria (Annonaceae)". Botanical Journal of the Linnean Society. 143 (1): 69–78. doi: 10.1046/j.1095-8339.2003.00204.x . ISSN   1095-8339.
  8. ↑ "Pseuduvaria glabrescens". Australian Plant Name Index (APNI). Centre for Australian National Biodiversity Research, Australian Government . Retrieved 2 September 2024.
  9. 1 2 F.A.Zich; B.P.M.Hyland; T.Whiffen; R.A.Kerrigan (2020). "Pseuduvaria mulgraveana var. glabrescens Jessup". Australian Tropical Rainforest Plants Edition 8 (RFK8). Centre for Australian National Biodiversity Research (CANBR), Australian Government . Retrieved 2 September 2024.
  10. ↑ "Search: variety: Pseuduvaria mulgraveana var. glabrescens | Occurrence records". Australasian Virtual Herbarium . Australian Government . Retrieved 2 September 2024.
  11. ↑ Morawetz, Wilfried (1988). "Karyosystematics and evolution of Australian Annonaceae as compared with Eupomatiaceae, Himantandraceae, and Austrobaileyaceae". Plant Systematics and Evolution. 159 (1–2): 49–79. Bibcode:1988PSyEv.159...49M. doi:10.1007/BF00937425. ISSN   0378-2697. S2CID   37956199.
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